Postpartum depression was more often reported by teenage moms, mothers with less than 12 years of education, Medicaid patients, smokers, victims of physical abuse before or during pregnancy, and women under traumatic or financial stress during pregnancy.

Having a low-birth-weight baby or a baby admitted to a neonatal intensive care unit was also tied to self-reported postpartum depression in most of the 17 states.

The postpartum depression statistics, published in the April 11 edition of the CDC's Morbidity and Mortality Weekly Report, don't separate women who became depressed after giving birth from women who were already depressed before pregnancy.

The CDC urges women to get treatment for postpartum depression for the sake of mother and baby alike.

The CDC also notes that the American College of Obstetricians and Gynecologists recommends that doctors screen all new moms for postpartum depression four to six weeks after birth.